Using anonymously submitted tips from the public as well as those reported through major social media like Facebook, Instagram, Twitter, and Snapchat (which all work closely with most local and federal law enforcement), the C4 Unit specifically is able to keep a watchful eye on the city through cameras and monitor posts. This is helpful to prevent crimes before they happen or get people help that they may need.
Read more about the policy from this February 2018 news article.